作者weei (weei)
看板TransBioChem
標題[討論] 有關mRNA的問題~~
時間Tue May 18 18:21:59 2010
Each eukaryotic mRNA, even after post-transcriptional modification, include
5' and 3' UTRs. Which are these?
A)the cap and tail at each end of the mRNA
B)the untranslate regions at either end of the coding sequence
C)the U attachment sites for the tRNAs
D)the U translation sites that signal the beginning of translation
E)the U-A pairs that are found in high frequency at the ends
ans:B
其實我有一點不懂這題在講啥
A是錯在哪裡???
還有mRNA的UTR也是從DNA轉錄過來的嗎???
轉錄是只轉錄 coding region 有包含UTR嗎??
麻煩各位了!!
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1F：推 ellenroy:UTR是cap跟真正的轉譯起始點中間的小片段 不會轉譯 05/18 18:55
2F：→ ellenroy:然後UTR的數量多寡會影響蛋白表現的強度 05/18 18:56
3F：→ ellenroy:大致上是這樣 還要更詳細的話我再去翻課本XDDD" 05/18 18:57
4F：→ weei:那A是錯在哪裡?? 所以UTR是另外加上去的，不是從DNA轉錄過來? 05/19 21:54
5F：推 ellenroy:cap跟tail是轉錄後加工才加上去的 UTR是DNA轉錄來的沒錯 05/19 22:21
6F：→ weei:了解了~~感謝^^ 05/20 14:50